mmc: sdio: Export SDIO revision and info strings to userspace

For SDIO functions, SDIO cards and SD COMBO cards are exported revision
number and info strings from CISTPL_VERS_1 structure. Revision number
should indicate compliance of standard and info strings should contain
product information in same format as product information for PCMCIA cards.

Product information for PCMCIA cards should contain following strings in
this order: Manufacturer, Product Name, Lot number, Programming Conditions.

Note that not all SDIO cards export all those info strings in that order as
described in PCMCIA Metaformat Specification.

Signed-off-by: Pali Rohár <pali@kernel.org>
Link: https://lore.kernel.org/r/20200727133837.19086-5-pali@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

4 files changed, 103 insertions, 3 deletions

diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 70207f11a654..c2e70b757dd1 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -68,6 +68,7 @@ mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	struct mmc_card *card = mmc_dev_to_card(dev);
 	const char *type;
+	unsigned int i;
 	int retval = 0;
 
 	switch (card->type) {
@@ -98,6 +99,17 @@ mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 					card->cis.vendor, card->cis.device);
 		if (retval)
 			return retval;
+
+		retval = add_uevent_var(env, "SDIO_REVISION=%u.%u",
+					card->major_rev, card->minor_rev);
+		if (retval)
+			return retval;
+
+		for (i = 0; i < card->num_info; i++) {
+			retval = add_uevent_var(env, "SDIO_INFO%u=%s", i+1, card->info[i]);
+			if (retval)
+				return retval;
+		}
 	}
 
 	/*
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 5a2210c25aa7..429ca14fa7e1 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -709,10 +709,34 @@ static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
 
 MMC_DEV_ATTR(vendor, "0x%04x\n", card->cis.vendor);
 MMC_DEV_ATTR(device, "0x%04x\n", card->cis.device);
+MMC_DEV_ATTR(revision, "%u.%u\n", card->major_rev, card->minor_rev);
+
+#define sdio_info_attr(num)									\
+static ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf)	\
+{												\
+	struct mmc_card *card = mmc_dev_to_card(dev);						\
+												\
+	if (num > card->num_info)								\
+		return -ENODATA;								\
+	if (!card->info[num-1][0])								\
+		return 0;									\
+	return sprintf(buf, "%s\n", card->info[num-1]);						\
+}												\
+static DEVICE_ATTR_RO(info##num)
+
+sdio_info_attr(1);
+sdio_info_attr(2);
+sdio_info_attr(3);
+sdio_info_attr(4);
 
 static struct attribute *sd_std_attrs[] = {
 	&dev_attr_vendor.attr,
 	&dev_attr_device.attr,
+	&dev_attr_revision.attr,
+	&dev_attr_info1.attr,
+	&dev_attr_info2.attr,
+	&dev_attr_info3.attr,
+	&dev_attr_info4.attr,
 	&dev_attr_cid.attr,
 	&dev_attr_csd.attr,
 	&dev_attr_scr.attr,
@@ -738,9 +762,15 @@ static umode_t sd_std_is_visible(struct kobject *kobj, struct attribute *attr,
 	struct device *dev = container_of(kobj, struct device, kobj);
 	struct mmc_card *card = mmc_dev_to_card(dev);
 
-	/* CIS vendor and device ids are available only for Combo cards */
-	if ((attr == &dev_attr_vendor.attr || attr == &dev_attr_device.attr) &&
-	    card->type != MMC_TYPE_SD_COMBO)
+	/* CIS vendor and device ids, revision and info string are available only for Combo cards */
+	if ((attr == &dev_attr_vendor.attr ||
+	     attr == &dev_attr_device.attr ||
+	     attr == &dev_attr_revision.attr ||
+	     attr == &dev_attr_info1.attr ||
+	     attr == &dev_attr_info2.attr ||
+	     attr == &dev_attr_info3.attr ||
+	     attr == &dev_attr_info4.attr
+	    ) && card->type != MMC_TYPE_SD_COMBO)
 		return 0;
 
 	return attr->mode;
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 7b40553d3934..694a212cbe25 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -29,12 +29,36 @@
 
 MMC_DEV_ATTR(vendor, "0x%04x\n", card->cis.vendor);
 MMC_DEV_ATTR(device, "0x%04x\n", card->cis.device);
+MMC_DEV_ATTR(revision, "%u.%u\n", card->major_rev, card->minor_rev);
 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
 
+#define sdio_info_attr(num)									\
+static ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf)	\
+{												\
+	struct mmc_card *card = mmc_dev_to_card(dev);						\
+												\
+	if (num > card->num_info)								\
+		return -ENODATA;								\
+	if (!card->info[num-1][0])								\
+		return 0;									\
+	return sprintf(buf, "%s\n", card->info[num-1]);						\
+}												\
+static DEVICE_ATTR_RO(info##num)
+
+sdio_info_attr(1);
+sdio_info_attr(2);
+sdio_info_attr(3);
+sdio_info_attr(4);
+
 static struct attribute *sdio_std_attrs[] = {
 	&dev_attr_vendor.attr,
 	&dev_attr_device.attr,
+	&dev_attr_revision.attr,
+	&dev_attr_info1.attr,
+	&dev_attr_info2.attr,
+	&dev_attr_info3.attr,
+	&dev_attr_info4.attr,
 	&dev_attr_ocr.attr,
 	&dev_attr_rca.attr,
 	NULL,
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 2384829c8fb2..3d709029e07c 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -42,12 +42,36 @@ static DEVICE_ATTR_RO(field)
 sdio_config_attr(class, "0x%02x\n", func->class);
 sdio_config_attr(vendor, "0x%04x\n", func->vendor);
 sdio_config_attr(device, "0x%04x\n", func->device);
+sdio_config_attr(revision, "%u.%u\n", func->major_rev, func->minor_rev);
 sdio_config_attr(modalias, "sdio:c%02Xv%04Xd%04X\n", func->class, func->vendor, func->device);
 
+#define sdio_info_attr(num)									\
+static ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf)	\
+{												\
+	struct sdio_func *func = dev_to_sdio_func(dev);						\
+												\
+	if (num > func->num_info)								\
+		return -ENODATA;								\
+	if (!func->info[num-1][0])								\
+		return 0;									\
+	return sprintf(buf, "%s\n", func->info[num-1]);						\
+}												\
+static DEVICE_ATTR_RO(info##num)
+
+sdio_info_attr(1);
+sdio_info_attr(2);
+sdio_info_attr(3);
+sdio_info_attr(4);
+
 static struct attribute *sdio_dev_attrs[] = {
 	&dev_attr_class.attr,
 	&dev_attr_vendor.attr,
 	&dev_attr_device.attr,
+	&dev_attr_revision.attr,
+	&dev_attr_info1.attr,
+	&dev_attr_info2.attr,
+	&dev_attr_info3.attr,
+	&dev_attr_info4.attr,
 	&dev_attr_modalias.attr,
 	NULL,
 };
@@ -98,6 +122,7 @@ static int
 sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	struct sdio_func *func = dev_to_sdio_func(dev);
+	unsigned int i;
 
 	if (add_uevent_var(env,
 			"SDIO_CLASS=%02X", func->class))
@@ -108,6 +133,15 @@ sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 		return -ENOMEM;
 
 	if (add_uevent_var(env,
+			"SDIO_REVISION=%u.%u", func->major_rev, func->minor_rev))
+		return -ENOMEM;
+
+	for (i = 0; i < func->num_info; i++) {
+		if (add_uevent_var(env, "SDIO_INFO%u=%s", i+1, func->info[i]))
+			return -ENOMEM;
+	}
+
+	if (add_uevent_var(env,
 			"MODALIAS=sdio:c%02Xv%04Xd%04X",
 			func->class, func->vendor, func->device))
 		return -ENOMEM;